{"ScriptPreparationCode":"var a = [1, 2, 3, 4, 5, 6];\r\nvar b = [1, 2, 3, 4, 5];\r\n","TestCases":[{"Name":"using set","Code":"const set = new Set(b);\r\nconst lastNonCommonElement = a.find(element =\u003E !set.has(element));\r\nconst index = a.lastIndexOf(lastNonCommonElement);","IsDeferred":false},{"Name":"using includes","Code":"\r\nconst lastNonCommonElement = a.find(element =\u003E !b.includes(element));\r\nconst index = a.lastIndexOf(lastNonCommonElement);","IsDeferred":false}]}